Holy and Ret paladins don't have Righteous Defense anymore iirc, so that macro is no longer possible.

You're wrong.
That is not the only taunt available to paladins, Righteous Defense hasn't be available to anyone but prot for like 3 expansions.
Reckoning is also a taunt, though every castable CC in the game now turns off their pets attacks on you.
IE: Polymorph turns their elementals attack off of you, so taunt does nothing to help break that.

THOUGH if you're versing a hunter team, taunt his pet on you to eleviate the pressure on your team mates.
Some times you can get lucky and taunt the hunter pet at the right time and break the paladin's repent on you, or similar.

I'm pretty sure the macro he was talking about was Holy Shock + Righteous Defense on party member, to taunt whatever was attacking that party member to go onto you, also pretty sure Righteous Defense was available to Holy and Ret Paladins in Cata.

You're wrong. It hasn't be available to anyone but prot for like 3 expansions.
Reckoning is still and always should be used.
I've been using it in 2300+ arenas for 3-4 expansions.
So.. Yeah.

You're wrong. It hasn't be available to anyone but prot for like 3 expansions.
Reckoning is still and always should be used.
I've been using it in 2300+ arenas for 3-4 expansions.
So.. Yeah.

Besides being wrong about the Righteous Defense thing and possibly about your rating (as others pointed out), Reckoning was just introduced in Wrath so I highly doubt you were using that for three to four expansions but rather this short period of MOP and two other expansions.